Diagnosis assistance apparatus, method and program

A diagnosis assistance method performed by a diagnosis assistance apparatus, the method comprising of:

• an image obtainment step of obtaining each of a first image and a second image obtained by imaging a region including the same tubular structure organ of the same subject at the same time;
• an organ region extraction step of extracting an organ region of the organ from the first image;
• a display control step of making the extracted organ region displayed on a display screen;
• a correction information obtainment step of receiving an input of an air region included in the first image and an input of exceeding or lacking portion information representing that the air region is a lacking portion or an exceeding portion of the organ, and obtaining the received air region and the received exceeding or lacking portion information corresponding to the air region, as correction information;
• a position matching step of calculating position-matching information that correlates corresponding positions to each other between the first image and the second image;
• a correction step of correcting, based on the correction information, the organ region extracted from the first image by adding a portion corresponding to the lacking portion or by deleting the exceeding portion;
• and
• an extraction step of extracting, based on the position-matching information, at least an air region in the second image located at a position corresponding to the air region corresponding to the correction information, as a part of the organ region in the second image.

A non-transitory computer-readable storage medium stored therein a diagnosis assistance program for causing a computer to perform:

• an image obtainment step of obtaining each of a first image and a second image obtained by imaging a region including the same tubular structure organ of the same subject at the same time;
• an organ region extraction step of extracting an organ region of the organ from the first image;
• a display control step of making the extracted organ region displayed on a display screen;
• a correction information obtainment step of receiving an input of an air region included in the first image and an input of exceeding or lacking portion information representing that the air region is a lacking portion or an exceeding portion of the organ, and obtaining the received air region and the received exceeding or lacking portion information corresponding to the air region, as correction information;
• a position matching step of calculating position-matching information that correlates corresponding positions to each other between the first image and the second image;
• a correction step of correcting, based on the correction information, the organ region extracted from the first image by adding a portion corresponding to the lacking portion or by deleting the exceeding portion;
• and
• an extraction step of extracting, based on the position-matching information, at least an air region in the second image located at a position corresponding to the air region corresponding to the correction information, as a part of the organ region in the second image.